narayana/conversations-classic
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make list selection manager work with app compat

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This commit is contained in:
Daniel Gultsch 2019-09-26 23:47:55 +02:00
parent f9e1e856d2
commit 11736ce48c
1 changed files with 177 additions and 177 deletions
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142
src/main/java/eu/siacs/conversations/ui/widget/ListSelectionManager.java
View file

@ -1,8 +1,5 @@
package eu.siacs.conversations.ui.widget; package eu.siacs.conversations.ui.widget;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import android.os.Handler; import android.os.Handler;
import android.os.Looper; import android.os.Looper;
import android.os.Message; import android.os.Message;
@ -13,12 +10,17 @@ import android.view.Menu;
import android.view.MenuItem; import android.view.MenuItem;
import android.widget.TextView; import android.widget.TextView;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class ListSelectionManager { public class ListSelectionManager {
private static final int MESSAGE_SEND_RESET = 1; private static final int MESSAGE_SEND_RESET = 1;
private static final int MESSAGE_RESET = 2; private static final int MESSAGE_RESET = 2;
private static final int MESSAGE_START_SELECTION = 3; private static final int MESSAGE_START_SELECTION = 3;
private static final Field FIELD_EDITOR;
private static final Method METHOD_START_SELECTION;
private static final boolean SUPPORTED;
private static final Handler HANDLER = new Handler(Looper.getMainLooper(), new Handler.Callback() { private static final Handler HANDLER = new Handler(Looper.getMainLooper(), new Handler.Callback() {
@Override @Override
@ -45,30 +47,58 @@ public class ListSelectionManager {
} }
}); });
private static class StartSelectionHolder { static {
Field editor;
public final ListSelectionManager listSelectionManager; try {
public final TextView textView; editor = TextView.class.getDeclaredField("mEditor");
public final int start; editor.setAccessible(true);
public final int end; } catch (Exception e) {
editor = null;
public StartSelectionHolder(ListSelectionManager listSelectionManager, TextView textView,
int start, int end) {
this.listSelectionManager = listSelectionManager;
this.textView = textView;
this.start = start;
this.end = end;
} }
FIELD_EDITOR = editor;
Method startSelection = null;
if (editor != null) {
String[] startSelectionNames = {"startSelectionActionMode", "startSelectionActionModeWithSelection"};
for (String startSelectionName : startSelectionNames) {
try {
startSelection = editor.getType().getDeclaredMethod(startSelectionName);
startSelection.setAccessible(true);
break;
} catch (Exception e) {
startSelection = null;
}
}
}
METHOD_START_SELECTION = startSelection;
SUPPORTED = FIELD_EDITOR != null && METHOD_START_SELECTION != null;
} }
private ActionMode selectionActionMode; private ActionMode selectionActionMode;
private Object selectionIdentifier; private Object selectionIdentifier;
private TextView selectionTextView; private TextView selectionTextView;
private Object futureSelectionIdentifier; private Object futureSelectionIdentifier;
private int futureSelectionStart; private int futureSelectionStart;
private int futureSelectionEnd; private int futureSelectionEnd;
public static boolean isSupported() {
return SUPPORTED;
}
private static void startSelection(TextView textView, int start, int end) {
final CharSequence text = textView.getText();
if (SUPPORTED && start >= 0 && end > start && textView.isTextSelectable() && text instanceof Spannable) {
final Spannable spannable = (Spannable) text;
start = Math.min(start, spannable.length());
end = Math.min(end, spannable.length());
Selection.setSelection(spannable, start, end);
try {
final Object editor = FIELD_EDITOR != null ? FIELD_EDITOR.get(textView) : textView;
METHOD_START_SELECTION.invoke(editor);
} catch (Exception e) {
}
}
}
public void onCreate(TextView textView, ActionMode.Callback additionalCallback) { public void onCreate(TextView textView, ActionMode.Callback additionalCallback) {
final CustomCallback callback = new CustomCallback(textView, additionalCallback); final CustomCallback callback = new CustomCallback(textView, additionalCallback);
textView.setCustomSelectionActionModeCallback(callback); textView.setCustomSelectionActionModeCallback(callback);
@ -76,14 +106,17 @@ public class ListSelectionManager {
public void onUpdate(TextView textView, Object identifier) { public void onUpdate(TextView textView, Object identifier) {
if (SUPPORTED) { if (SUPPORTED) {
CustomCallback callback = (CustomCallback) textView.getCustomSelectionActionModeCallback(); final ActionMode.Callback callback = textView.getCustomSelectionActionModeCallback();
callback.identifier = identifier; if (callback instanceof CustomCallback) {
final CustomCallback customCallback = (CustomCallback) textView.getCustomSelectionActionModeCallback();
customCallback.identifier = identifier;
if (futureSelectionIdentifier == identifier) { if (futureSelectionIdentifier == identifier) {
HANDLER.obtainMessage(MESSAGE_START_SELECTION, new StartSelectionHolder(this, HANDLER.obtainMessage(MESSAGE_START_SELECTION, new StartSelectionHolder(this,
textView, futureSelectionStart, futureSelectionEnd)).sendToTarget(); textView, futureSelectionStart, futureSelectionEnd)).sendToTarget();
} }
} }
} }
}
public void onBeforeNotifyDataSetChanged() { public void onBeforeNotifyDataSetChanged() {
if (SUPPORTED) { if (SUPPORTED) {
@ -109,13 +142,29 @@ public class ListSelectionManager {
} }
} }
private static class StartSelectionHolder {
final ListSelectionManager listSelectionManager;
final TextView textView;
public final int start;
public final int end;
StartSelectionHolder(ListSelectionManager listSelectionManager, TextView textView,
int start, int end) {
this.listSelectionManager = listSelectionManager;
this.textView = textView;
this.start = start;
this.end = end;
}
}
private class CustomCallback implements ActionMode.Callback { private class CustomCallback implements ActionMode.Callback {
private final TextView textView; private final TextView textView;
private final ActionMode.Callback additionalCallback; private final ActionMode.Callback additionalCallback;
public Object identifier; Object identifier;
public CustomCallback(TextView textView, ActionMode.Callback additionalCallback) { CustomCallback(TextView textView, ActionMode.Callback additionalCallback) {
this.textView = textView; this.textView = textView;
this.additionalCallback = additionalCallback; this.additionalCallback = additionalCallback;
} }
@ -159,53 +208,4 @@ public class ListSelectionManager {
} }
} }
} }
private static final Field FIELD_EDITOR;
private static final Method METHOD_START_SELECTION;
private static final boolean SUPPORTED;
static {
Field editor;
try {
editor = TextView.class.getDeclaredField("mEditor");
editor.setAccessible(true);
} catch (Exception e) {
editor = null;
}
FIELD_EDITOR = editor;
Method startSelection = null;
if (editor != null) {
String[] startSelectionNames = {"startSelectionActionMode", "startSelectionActionModeWithSelection"};
for (String startSelectionName : startSelectionNames) {
try {
startSelection = editor.getType().getDeclaredMethod(startSelectionName);
startSelection.setAccessible(true);
break;
} catch (Exception e) {
startSelection = null;
}
}
}
METHOD_START_SELECTION = startSelection;
SUPPORTED = FIELD_EDITOR != null && METHOD_START_SELECTION != null;
}
public static boolean isSupported() {
return SUPPORTED;
}
public static void startSelection(TextView textView, int start, int end) {
final CharSequence text = textView.getText();
if (SUPPORTED && start >= 0 && end > start && textView.isTextSelectable() && text instanceof Spannable) {
final Spannable spannable = (Spannable) text;
start = Math.min(start, spannable.length());
end = Math.min(end, spannable.length());
Selection.setSelection(spannable, start, end);
try {
final Object editor = FIELD_EDITOR != null ? FIELD_EDITOR.get(textView) : textView;
METHOD_START_SELECTION.invoke(editor);
} catch (Exception e) {
}
}
}
} }